If I have to put up with slow charging (and therefore perhaps take an extra vacation day), or have to rent a car or fly, for 2-3 trips, that's thousands of doll

If I have to put up with slow charging (and therefore perhaps take an extra vacation day), or have to rent a car or fly, for 2-3 trips, that's thousands of dollars every year, not a $50 delivery charge. If I have to seriously inconvenience my grandparents every time I go to visit them, that generates a lot of stress and potentially puts them at risk (grandpa is turning 95 this year; he doesn't travel well.) But I can buy a plug-in hybrid like the Chevy Volt for a couple grand less than the cheap Tesla (counting the same tax incentives), and it works for every trip. With the gas generator, it has a range of over 300 miles, and can refill about 280-290 miles of range at an ordinary gas station in 5 minutes. So I can spend a similar amount of money for a much more convenient experience by going with a hybrid and ignoring the superchargers entirely. Point being, the argument that the supercharger network covers "almost everyone" is flawed. There are a lot of people for whom it still misses at least some of their trips, where other types of EVs perform better, and missing some trips is far more relevant than you seem to give it credit for. Again, it's not like spending $thousands to avoid the occasional $50 delivery charge for plywood. It's spending basically the same amount on a different type of technology to avoid the occasional flight, car rental, or extra stress on the grandparents. The supercharger network will need to be much more dense before it gets to the point of being a major factor in Tesla's favor.